Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities	$ 78,700	$ (2,373,800)
Financing activities:
Proceeds from issuance of common stocks pursuant to private placements	1,305,000
Net cash provided by financing activities	1,305,000
Net increase (decrease) in cash and cash equivalents	1,383,700	(2,373,800)
Cash, cash equivalents, beginning of period	7,263,600	7,380,700
Cash, cash equivalents, end of period	8,647,300	5,006,900
Supplemental Cash Flow Information
Payment of interest expenses		120,000
Payment of income tax expenses
Non-cash Investing and Financing activities
Collection of USDC from subscription fee from investors	50,000
Issuance of common stocks to settle advance from subscription fee from investors	$ 6,539,000